Infobox Software name Hopsan screenshot Image HopsanNG Screenshot.png 350px caption A position servo with dynamic pressure feedback modelled in Hopsan developer Division of Fluid and Mechatronic Systems , Link ping University released 2011 latest release version 0.5.4 latest release date start date and age 2012 04 11 programming language C platform Cross platform language English language English genre Mathematical model modeling , Computer Simulation simulation , Optimization mathematics optimization license Freeware website http www.iei.liu.se flumes hopsanng Hopsan website Hopsan is a free Computer Simulation simulation environment for Fluid power fluid and Mechatronics mechatronic systems ... components. History The development on Hopsan first began in 1977 ref cite web url http www.iei.liu.se flumes hopsan?l en title HOPSAN website accessdate 2011 02 05 ref at the Division of Hydraulics ... models in a more straightforward way. In 2009 the development of the first version of Hopsan was dropped ... is Hopsan NG, and the first beta version was released in February 2011 ref cite web url http www.iei.liu.se flumes hopsanng?l en title Hopsan website accessdate 2011 02 05 ref . Parts of the source code in Hopsan was used in the OpenModelica Connection Editor OMEdit ref cite web url http www.openmodelica.org ... generation of Hopsan consists of two parts, a graphical user interface and a simulation core library ..., which can be loaded from Hopsan. There is also a built in automated equation based component generator ... plots. Hopsan models can be exported to Simulink. Plot data can be exported to XML , Comma separated values CSV , gnuplot and Matlab . Experiments with including the Hopsan simulation core to LabVIEW .... Hopsan is a cross platform project, with the intention of running on Windows , Unix and Macintosh .... Hopsan has support for dividing simulations in separate Thread computer science threads , making ... flumes hopsanng?l en Hopsan website https winston.iei.liu.se redmine projects hopsanHopsan ... more details
In mathematics , a bi directional delay line is a numerical analysis technique used in computer simulation for solving ordinary differential equation s by converting them to hyperbolic equation s. In this way an explicit solution scheme is obtained with highly robust numerical properties. It was introduced by Auslander in 1968. It originates from simulation of hydraulic pipeline s where wave propagation was studied. It was then found that it could be used as an efficient numerical technique for numerically insulating different parts of a simulation model in each times step. It is used in the HOPSAN simulation package Krus et. al. 1990 . It is also known as the transmission line method TLM from an independent development by Johns and O Brian 1980. This is also extended to partial differential equations. References D.M. Auslander, Distributed System Simulation with Bilateral Delay Line Models , Journal of Basic Engineering, Trans. ASME p195 p200. June 1968. P. B. Johns and M.O Brien. Use of the transmission line modelling t.l.m method to solve nonlinear lumped networks , The Radio Electron and Engineer. 1980. P Krus, A Jansson, J O Palmberg, K Weddfeldt. Distributed Simulation of Hydromechanical Systems . Presented at Third Bath International Fluid Power Workshop , Bath, UK 1990. Category Numerical differential equations Category Numerical analysis mathanalysis stub ... more details
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